Stop-cock.



PATENTED OCT. 11, 1904.

W. THEIS. STOP COCK.

APPLICATION FILED NOV. 2, 1903.

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UNITED STATES Patented October 11, 1904.

PATENT OFFICE.

STOP-COCK.

SPECIFICATION forming part of Letters Patent No. 772,007, dated October 11, 1904.

Application filed November 2, 1903. Serial No. 179,488. (No model.)

To all whom it may concern.-

Be it known that I, WILHELM THEIs, a citizen of Germany, residing at Dusseldorf, Germany, have invented certain new and useful Improvements in Stop-Cocks, of which the following is a specification.

Stop-cocks when used for the passage of hot fluid or of steam suffer from a defect which not unfrequently leads to accidentsviz., the expansion of the cone as soon as it is turned open to let the steam or hot fluid pass. This expansion takes place before the casing inclosing the cone can expand, and the consequence is that the latter is jammed so tightly within the said casing that it becomes almost impossible and even dangerous to turn it.

My invention relates to an improved stopcock which is provided with a casing that contains a compartment or jacket connected with the pipe supplying the steam or hot fluid, and its object is to do away with the above-mentioned trouble. is provided with means for holding the cone in its place and prevent its settling. As above mentioned, the casing around the cock is provided with a compartment which is in direct communication with the steam-supply pipe. By allowing the steam or hot fluid to enter the said compartment a few minutes before opening the cone the casing will become warm and expand accordingly, so that when the steam is made to pass through the cock and by its heat causes the cone to expand the expansion of both the cone and the casing will be equal, and the opening and closing of the passage will no longer meet with difliculties.

In the accompanying drawings, Figure 1 is a longitudinal section, partly in elevation, of my improved stop-cock; Fig. 2, a cross-section on line A B, Fig. 1; and Fig. 3, asimilar section through the center of the plug-perforation.

The letter a represents a tapering valvecasing communicating by ports a with steam or hot fluid inlet 5 and outlet 0, as usual. Within the casing 60 is free to turn the tapering plug it, having stem Z and perforation it. When the opening in the plug registers with the ports a the cock is open, while when the Moreover,my improved cock perforation is out of alinement with the ports the cock is closed. The casing a is surrounded by a shell is, provided with a pair of inwardly projecting oval flanges Z2 These flanges are arranged diametrically opposite each other at the steam inlet and outlet, respectively, and are engaged by corresponding outwardly-projecting flanges a of casing a. In this Way there is formed between the easing a and the shell is an annular heating jacket or chamber In. The flanges Z0 (4 form jointly an inlet-passage through chamber it from the pipe Z) to the cook it and an outlet-passage from the cock to the pipe 0. The jacket Z receives steam or hot fluid from the inlet Z) by means of a by-pass (Z and discharges the same at a point opposite the inlet through an exhaust cZ. Thus when steam, &c., is admitted to the jacket previous to the opening of the cock the casing will be expanded suflicient to prevent jamming of the plug. In order to avoid a settling of the plug within the casing when the latter becomes distended, I provide a divided disk-spring f or a spring of other construction. This spring engages a groove in the stem Z and bears upon an offset a of casing a. The spring f will draw the plug upward without preventing the manipulation of the usual tightening-nut s. The plug-spindle Z is stepped, as at Z, and is here surrounded by a packing m. This packing assists the spring f in preventing a jamming of the plug, while the steps Z prevent the escape of the steam along the surface of the spindle.

What I claim is 1. In a stop-cock, the combination of a flanged shell, with a flanged casing to form an intervening annular chamber, a plug within the casing, and means for admitting a heating meldium to the chamber, substantially as specifiec 2. In a stop-cock, a flanged shell and a flanged casing that form an intervening annular chamber, and apassage through said chamber, combined with aplug inolosed by the easing, inlet and exit pipes, and a bypass that connects the inlet-pipe with the chamber, substantially as specified.

3. In a stop-cock, the combination of a casing having an inlet and outlet, with an inscribed my name in the presence of two Witclosed spring-influenced plug having a stepped nesses. spindle, a jacket surrounding the casing, a bypass for connecting the inlet with the jacket, and a packing surrounding the plug-spindle, substantially as specified.

In Witness whereof I have hereunto sub- WVILHELM THEIS.

Witnesses:

\VILL'IAM EssuNwnIN, PETER LIEBER. 

